tidy now installs typos-cli as-needed via cargo

Author: lolbinarycat

compiler/rustc_resolve/src/imports.rs

@@ -866,7 +866,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
             }
             ImportKind::Glob { .. } => {
                 // FIXME: Use mutable resolver directly as a hack, this should be an output of
-                // specualtive resolution.
+                // speculative resolution.
                 self.get_mut_unchecked().resolve_glob_import(import);
                 return 0;
             }
@@ -903,7 +903,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
                         // We need the `target`, `source` can be extracted.
                         let imported_binding = this.import(binding, import);
                         // FIXME: Use mutable resolver directly as a hack, this should be an output of
-                        // specualtive resolution.
+                        // speculative resolution.
                         this.get_mut_unchecked().define_binding_local(
                             parent,
                             target,
@@ -917,7 +917,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
                         if target.name != kw::Underscore {
                             let key = BindingKey::new(target, ns);
                             // FIXME: Use mutable resolver directly as a hack, this should be an output of
-                            // specualtive resolution.
+                            // speculative resolution.
                             this.get_mut_unchecked().update_local_resolution(
                                 parent,
                                 key,

library/std/src/sys/mod.rs

@@ -1,7 +1,7 @@
 #![allow(unsafe_op_in_unsafe_fn)]
 
 /// The configure builtins provides runtime support compiler-builtin features
-/// which require dynamic intialization to work as expected, e.g. aarch64
+/// which require dynamic initialization to work as expected, e.g. aarch64
 /// outline-atomics.
 mod configure_builtins;
 

src/tools/tidy/src/extra_checks/mod.rs

@@ -41,7 +41,6 @@ const RUFF_CONFIG_PATH: &[&str] = &["src", "tools", "tidy", "config", "ruff.toml
 const RUFF_CACHE_PATH: &[&str] = &["cache", "ruff_cache"];
 const PIP_REQ_PATH: &[&str] = &["src", "tools", "tidy", "config", "requirements.txt"];
 
-// this must be kept in sync with with .github/workflows/spellcheck.yml
 const SPELLCHECK_DIRS: &[&str] = &["compiler", "library", "src/bootstrap", "src/librustdoc"];
 
 pub fn check(
@@ -51,6 +50,7 @@ pub fn check(
     librustdoc_path: &Path,
     tools_path: &Path,
     npm: &Path,
+    cargo: &Path,
     bless: bool,
     extra_checks: Option<&str>,
     pos_args: &[String],
@@ -63,6 +63,7 @@ pub fn check(
         librustdoc_path,
         tools_path,
         npm,
+        cargo,
         bless,
         extra_checks,
         pos_args,
@@ -78,6 +79,7 @@ fn check_impl(
     librustdoc_path: &Path,
     tools_path: &Path,
     npm: &Path,
+    cargo: &Path,
     bless: bool,
     extra_checks: Option<&str>,
     pos_args: &[String],
@@ -293,7 +295,7 @@ fn check_impl(
         } else {
             eprintln!("spellcheck files");
         }
-        spellcheck_runner(&args)?;
+        spellcheck_runner(&outdir, &cargo, &args)?;
     }
 
     if js_lint || js_typecheck {
@@ -576,33 +578,12 @@ fn shellcheck_runner(args: &[&OsStr]) -> Result<(), Error> {
     if status.success() { Ok(()) } else { Err(Error::FailedCheck("shellcheck")) }
 }
 
-/// Check that spellchecker is installed then run it at the given path
-fn spellcheck_runner(args: &[&str]) -> Result<(), Error> {
-    // sync version with .github/workflows/spellcheck.yml
-    let expected_version = "typos-cli 1.34.0";
-    match Command::new("typos").arg("--version").output() {
-        Ok(o) => {
-            let stdout = String::from_utf8_lossy(&o.stdout);
-            if stdout.trim() != expected_version {
-                return Err(Error::Version {
-                    program: "typos",
-                    required: expected_version,
-                    installed: stdout.trim().to_string(),
-                });
-            }
-        }
-        Err(e) if e.kind() == io::ErrorKind::NotFound => {
-            return Err(Error::MissingReq(
-                "typos",
-                "spellcheck file checks",
-                // sync version with .github/workflows/spellcheck.yml
-                Some("install tool via `cargo install [email protected]`".to_owned()),
-            ));
-        }
-        Err(e) => return Err(e.into()),
-    }
+/// Ensure that spellchecker is installed then run it at the given path
+fn spellcheck_runner(outdir: &Path, cargo: &Path, args: &[&str]) -> Result<(), Error> {
+    let bin_path =
+        crate::ensure_version_or_cargo_install(outdir, cargo, "typos-cli", "typos", "1.34.0")?;
 
-    let status = Command::new("typos").args(args).status()?;
+    let status = Command::new(bin_path).args(args).status()?;
     if status.success() { Ok(()) } else { Err(Error::FailedCheck("typos")) }
 }
 

src/tools/tidy/src/lib.rs

@@ -4,7 +4,9 @@
 //! to be used by tools.
 
 use std::ffi::OsStr;
+use std::path::{Path, PathBuf};
 use std::process::Command;
+use std::{env, io};
 
 use build_helper::ci::CiEnv;
 use build_helper::git::{GitConfig, get_closest_upstream_commit};
@@ -180,6 +182,70 @@ pub fn files_modified(ci_info: &CiInfo, pred: impl Fn(&str) -> bool) -> bool {
     !v.is_empty()
 }
 
+/// If the given executable is installed with the given version, use that,
+/// otherwise install via cargo.
+pub fn ensure_version_or_cargo_install(
+    build_dir: &Path,
+    cargo: &Path,
+    pkg_name: &str,
+    bin_name: &str,
+    version: &str,
+) -> io::Result<PathBuf> {
+    // ignore the process exit code here and instead just let the version number check fail.
+    // we also importantly don't return if the program wasn't installed,
+    // instead we want to continue to the fallback.
+    'ck: {
+        // FIXME: rewrite as if-let chain once this crate is 2024 edition.
+        let Ok(output) = Command::new(bin_name).arg("--version").output() else {
+            break 'ck;
+        };
+        let Ok(s) = str::from_utf8(&output.stdout) else {
+            break 'ck;
+        };
+        let Some(v) = s.trim().split_whitespace().last() else {
+            break 'ck;
+        };
+        if v == version {
+            return Ok(PathBuf::from(bin_name));
+        }
+    }
+
+    let tool_root_dir = build_dir.join("misc-tools");
+    let tool_bin_dir = tool_root_dir.join("bin");
+    eprintln!("building external tool {bin_name} from package {pkg_name}@{version}");
+    // use --force to ensure that if the required version is bumped, we update it.
+    // use --target-dir to ensure we have a build cache so repeated invocations aren't slow.
+    // modify PATH so that cargo doesn't print a warning telling the user to modify the path.
+    let cargo_exit_code = Command::new(cargo)
+        .args(["install", "--locked", "--force", "--quiet"])
+        .arg("--root")
+        .arg(&tool_root_dir)
+        .arg("--target-dir")
+        .arg(tool_root_dir.join("target"))
+        .arg(format!("{pkg_name}@{version}"))
+        .env(
+            "PATH",
+            env::join_paths(
+                env::split_paths(&env::var("PATH").unwrap())
+                    .chain(std::iter::once(tool_bin_dir.clone())),
+            )
+            .expect("build dir contains invalid char"),
+        )
+        .env("RUSTFLAGS", "-Copt-level=0")
+        .spawn()?
+        .wait()?;
+    if !cargo_exit_code.success() {
+        return Err(io::Error::other("cargo install failed"));
+    }
+    let bin_path = tool_bin_dir.join(bin_name);
+    assert!(
+        matches!(bin_path.try_exists(), Ok(true)),
+        "cargo install did not produce the expected binary"
+    );
+    eprintln!("finished building tool {bin_name}");
+    Ok(bin_path)
+}
+
 pub mod alphabetical;
 pub mod bins;
 pub mod debug_artifacts;

src/tools/tidy/src/main.rs

@@ -184,6 +184,7 @@ fn main() {
             &librustdoc_path,
             &tools_path,
             &npm,
+            &cargo,
             bless,
             extra_checks,
             pos_args